I spent a little time trying to make some of the grass textures blend better with the terrain.

This has always been difficult because the grass shaders are very different from the terrain shaders, so you get different colors and light based on many factors. For example, if there's a specular highlight in the terrain, that doesn't affect the grass at all, so its always going to look disjointed.

On a side note, I've been trying to figure out how to get the terrain textures to blend with other game objects, so if I figure that out, I'd assume I could apply it to the grass shaders too - that would be awesome.